I suggest a change in the machine. Instead of having it spit out weapons onto the ground behind it, shoot out massive explosives at random angles for 2d10 distance. The explosives should do perhaps 2d6 damage and have an explosive radius of 3 inches.

my suggestion would be just have it as an "NPC" unit. Basically it starts in the middle of the battlefield and it moves towards the nearest dead (or not dead) recyclable object (pizza, cults, minifigs, pretty much anything) and starts recycling it, once it's done it moves to the next nearest object.